Why is the concept of spiritual Israel important for Christians?

The concept of spiritual Israel is pivotal for Christians, as it means that God's covenant people are not restricted to ethnically Jewish individuals but encompass all who have faith in Jesus Christ. By recognizing both Jews and Gentiles as part of spiritual Israel, believers understand that God's grace transcends ethnic and cultural boundaries. This fosters unity among the believers and affirms that salvation is a gift to all who are part of the elect, thus eradicating any grounds for pride based on ethnic lineage. Ephesians 2:12-13 illustrates this beautifully, as it states that those who were once far off have been brought near by the blood of Christ, demonstrating that all believers are members of God's chosen people, regardless of their background.